Cmterm 7941 7961 Sip 8 5 4 Zipl Fixed -
Digest authentication mismatch. Fix: In CUCM, under phone configuration, check SIP Digest Credentials . Re-enter the username and password. Delete and re-add the line.
| Feature | SCCP (Stock) | SIP 8.5.4 | | :--- | :--- | :--- | | | CUCM only | Asterisk, FreeSWITCH, 3CX, Kamailio, Metaswitch | | Encryption | Limited | TLS/SRTP support | | Provisioning | DHCP + TFTP (binary) | HTTP/HTTPS + XML configs | | Codecs | G.711, G.729a | + G.722 (HD voice capable) | | NAT traversal | Poor | Improved rport + STUN | cmterm 7941 7961 sip 8 5 4 zipl
This zip format is specifically intended for manual installation via a TFTP server Digest authentication mismatch
The firmware file is a critical software package for administrators managing Cisco Unified IP Phones, specifically the 7941G and 7961G models. This specific version (8.5.4) serves as a stable bridge for organizations using Session Initiation Protocol (SIP) rather than the proprietary Skinny Client Control Protocol (SCCP). Delete and re-add the line
As this is an older release, it may not contain patches for the most recent network security threats. If your environment allows it, always test if the device can handle the final 9.4(2)SR3 release.
The 8.5.4 load fixed a long-standing bug where 7941/7961 phones behind SBCs (Session Border Controllers) would fail to re-register after a SIP OPTIONS ping timeout. This made it the gold standard for remote worker deployments.